From 83c3e5e17b5e3057ac304383a46e3c485d00ffed Mon Sep 17 00:00:00 2001
From: Yufen Yu <yuyufen@huawei.com>
Date: Wed, 22 Jul 2020 23:29:05 -0400
Subject: [PATCH] md/raid5: use do_div() for 64 bit divisions in
raid5_sync_request
Git-commit: 83c3e5e17b5e3057ac304383a46e3c485d00ffed
Patch-mainline: v5.9-rc1
References: jsc#SLE-13984
We get compilation error on 32-bit architectures (e.g. m68k), as:
ERROR: modpost: "__udivdi3" [drivers/md/raid456.ko] undefined!
Since 'sync_blocks' is defined as u64, use do_div() to fix this error.
Fixes: c911c46c017c ("md/raid456: convert macro STRIPE_* to RAID5_STRIPE_*")
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/md/raid5.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 40961dd1777b..a6ff6e1e039b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -6104,7 +6104,7 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n
!md_bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
sync_blocks >= RAID5_STRIPE_SECTORS(conf)) {
/* we can skip this block, and probably more */
- sync_blocks /= RAID5_STRIPE_SECTORS(conf);
+ do_div(sync_blocks, RAID5_STRIPE_SECTORS(conf));
*skipped = 1;
/* keep things rounded to whole stripes */
return sync_blocks * RAID5_STRIPE_SECTORS(conf);
--
2.26.2